Title

Author

Date of Award

2001

Degree Type

Thesis

Degree Name

M.A.Sc.

Department

Civil and Environmental Engineering

First Advisor

Reitsma, Stanley,

Keywords

Engineering, Environmental.

Rights

CC BY-NC-ND 4.0

Abstract

Reduction in hydraulic conductivity due to manganese dioxide precipitation has been identified as a potential limitation for practical application of in-situ permanganate oxidation remediation technology. The objective of the present research is to quantify the reduction in permeability due to manganese dioxide precipitation. One-dimensional column experiments were performed using medium grain size silica sand to determine hydraulic conductivity reduction as a function of hydraulic gradient and amount of manganese dioxide. Complete plugging of the sand packs was observed at hydraulic gradients near unity within four to eight days of testing. Calculated manganese dioxide concentrations of approximately 0.02 g per cubic centimetre of sand caused complete plugging at hydraulic gradients near unity. The hydraulic conductivity values were highly dependent on hydraulic gradient, where the reduction in hydraulic conductivity was lower for higher gradients. At low hydraulic gradients, the reduction in hydraulic conductivity exceeds predicted reductions using functional equations developed for colloid transport reported in literature. Observed hydraulic conductivity reduction is consistent with published behaviour for plugging of porous media by colloids, which indicates that manganese dioxide precipitation is a colloid transport phenomena.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2001 .R36. Source: Masters Abstracts International, Volume: 40-03, page: 0763. Adviser: Stanley Reitsma. Thesis (M.A.Sc.)--University of Windsor (Canada), 2001.